this year doesnt appear to have any groupings with regard to parking, at least according to the map. usually they post what section the Evos park, the 3000GTs, etc.

Im guessing its gonna be a free for all. based on this map (unfortunately Mitsubishi forgot to label how many fit on the main lot), parking inside will be approximately 400-500 cars max including vendor parking. so it might be a good idea to camp out to make sure you get a good spot.